<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box {
            width: 340px;
            height: 42px;
            background-color: #fff;
            border: 2px solid #f63413;
        }
        .box1 {
            position: relative;
            float: left;
            width: 200px;
            height: 100%;
            background-color: #f63413;
            text-align: center;
        }

        .box1 .tri {
            position: absolute;
            right: 0;
            bottom: 0;
            width: 0;
            height: 0;
            border-style: solid;
            border-width: 42px 21px 0 0;
            border-color: transparent #fff transparent transparent;
        }
        .box1 .low {
            color: #fff;
            font: 700 28px/42px 'Microsoft yahei';
        }
        .box2 {
            float: left;
            width: 140px;
            height: 100%;
            text-align: center;
        }
        .box2 .high {
            font: 400 22px/42px 'Microsoft yahei';
            color: #949796;
            text-decoration: line-through;
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="box1">
            <span class="low">¥1650.00</span>
            <span class="tri"></span>
        </div>
        <div class="box2">
            <span class="high">¥5088.00</span>
        </div>
    </div>
</body>

</html>